Narongrit Auppathum, Managing Director of Cementhai Home Services and Wiphanu Intarasompong, Technical Service Manager of CRTC along with other executives and teams of these two companies were present at the certificate presentation ceremony for concrete roofing technicians. At this ceremony, Somchai Tiemsanit, Director of Labour’s Skill Development Center, Saraburi, representing the Department of Skill Development, made a speech on the National Skill Standards 2011 and presented the certificates to technicians and assistant technicians who passed the test of Roofing School.